EP0754797B1 - Verfahren und Vorrichtung zum Positionieren der Haltestellung der Trommel einer Topladerwaschmaschine - Google Patents

Verfahren und Vorrichtung zum Positionieren der Haltestellung der Trommel einer Topladerwaschmaschine Download PDF

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Publication number
EP0754797B1
EP0754797B1 EP96401568A EP96401568A EP0754797B1 EP 0754797 B1 EP0754797 B1 EP 0754797B1 EP 96401568 A EP96401568 A EP 96401568A EP 96401568 A EP96401568 A EP 96401568A EP 0754797 B1 EP0754797 B1 EP 0754797B1
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EP
European Patent Office
Prior art keywords
stop
pulses
positioning
motor
drum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96401568A
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English (en)
French (fr)
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EP0754797A1 (de
Inventor
Philippe Couillaud
Jean-Claude Geay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Esswein SA
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Esswein SA
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Publication of EP0754797A1 publication Critical patent/EP0754797A1/de
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/302—Automatic drum positioning

Definitions

  • the present invention relates to a method of stationary positioning of a rotating part driven by a universal motor, particular of the drum of a top-loading washing machine, and to a device for implementing this method.
  • a top-loading washing machine it is better than at any time during an operating cycle, especially at the end of the treatment cycle, generally after the last spin or after drying, the drum stops in such a way that its door is just in face of the upper opening of the machine, so that the user can remove or add laundry without having to turn the drum by hand.
  • Drum positioning devices are known asynchronous motor, but these devices cannot be used with a so-called universal type motor, which is generally used in today's washing machines.
  • the subject of the present invention is a positioning method when a rotating part stops, driven in rotation by a universal motor, in particular the drum of a top-loading washing machine, allowing to stop this drum so that its gate stops facing the upper opening of the machine (the one through which the laundry is introduced and in almost all use cases, the quickest possible.
  • the present invention also relates to a device for implementation of this process, the device which is as inexpensive as possible.
  • the process according to the invention consists in locating the point stopping the rotating part using an electrical output sensor, and from the start of the engine shutdown phase, cut off its power supply and to send it controlled current pulses, substantially regularly spaced, of increasing durations until detection of the shift to the stop point, then reverse the direction of rotation if the part does not did not stop at the desired position and send it to others substantially regularly spaced current pulses of durations increasing, and so on until stopping at the desired position.
  • a second command is ordered positioning phase which applies another series to the motor pulses of increasing duration, with possible change of direction of rotation at each passage through the desired position, and we stop sending these pulses when the part is as close as possible to the position sought, or when this piece passes for the first time of this second phase by the position sought.
  • the device for implementing the method of the invention applied to a machine comprising a rotary part driven in rotation by a universal motor includes a position or presence sensor, one of which first part is fixed on the rotating part and the second on the support of the rotating part, facing the first part when the rotating part is in the desired stop position, a processing circuit connected to one of the parts of the sensor, and an engine control device, connected to the sensor and comprising circuits for producing current pulses of duration variable.
  • the present invention is described below with reference to a washing machine, but it is understood that it can be used in other types of machines or equipment requiring positioning precise when stopping rotating parts, for example a dryer top loading drum.
  • FIG 1 only the parts of the washing machine are shown. necessary for understanding the invention, namely the pulley 1 of the machine drum, its universal drive motor 2, and the belt 3 which connects them.
  • a magnet is attached to the pulley 1, near its edge 4, and a flexible blade switch 5 is fixed on the frame of the machine, so that it is right in front of magnet 4 and as close as possible to it when the door of the drum carrying the pulley 1 is just opposite the top opening of the washing machine.
  • Switch 5 is connected to an input of a microprocessor 6.
  • This microprocessor is either that equipping the machine, when this is the case, a processor dedicated to the function of positioning of the drum.
  • the microprocessor 6 is connected to a circuit 7 of motor control 2.
  • This circuit 7 is a power circuit which control, in a manner known per se, under the control of the microprocessor of the machine, where it exists, or an electromechanical programmer, different engine speeds (start, stop, reverse direction of rotation and different speeds).
  • the microprocessor 6 also controls circuit 7 by sending it to motor 2 variable width current pulses, as described below.
  • the microprocessor program 6 begins the drum positioning phase, for example after the last spin of the laundry contained in this drum.
  • the drum has stopped so that the magnet 4 is far from the switch 5.
  • This switch 5 is therefore open.
  • the microprocessor 6 goes to a first subroutine which then controls the sending by the circuit 7 of controlled pulses (allowing speed regulation) to the motor 2.
  • the first of these pulses is referenced I1.
  • the duration of this pulse I1 is for example around 200 ms, and it makes the motor 2 rotate by a certain angle.
  • I1 the magnet 4 is still distant from the switch 5.
  • the microprocessor 6 commands, at time t2, the sending of a third pulse I3 to the motor 2.
  • the magnet 4 passes in front of the switch 5 at the instant t3, but that the inertia of the motor + drum assembly causes the latter a little beyond the angular position d 'stop sought.
  • the temporary closure of switch 5, taken into account by the microprocessor 6, passes it to a second subroutine which controls the reversal of the direction of rotation of the motor 2 and the sending, approximately 2 seconds after t3, at time t4, of a pulse I4 lasting approximately 200 ms.
  • a pulse I4 lasting approximately 200 ms.
  • the microprocessor 6 commands the sending of another pulse, similar to I2, and so on until the closure of switch 5. If this closure is the positioning program stops. Otherwise, said first subroutine is called again, and so on.
  • the microprocessor can easily detect the passage of the magnet 4 in front of the switch 5, the speed of drum rotation is relatively low (e.g. less than 40 rpm), so that the impulse produced by the transient closure of the switch at the passage of the magnet has a sufficient width to be taken into account by the electronic circuits of the microprocessor.
  • the positioning program may take a long time high to stop the drum at the right angular position, or even not there arrive.
  • the invention provides, according to an advantageous aspect, for limit, for example to about one minute, the research phase.

Claims (11)

  1. Verfahren, um beim Anhalten ein drehbares Teil (1) zu positionieren, das von einem Universalmotor (2) in Drehung angetrieben ist, gemäß welchem der Haltepunkt des drehbaren Teils (2) mit Hilfe eines Sensors (4, 5) mit elektrischem Ausgang markiert wird, dadurch gekennzeichnet, daß es darin besteht, gleich am Anfang der Haltephase des Motors des Teils dessen Versorgung zu unterbrechen und diesem kontrollierte, im wesentlichen gleichmäßig beabstandete Stromimpulse (l1, l2, l3) von steigender Dauer zu senden, bis das Vorbeilaufen am Haltepunkt erfaßt ist, die Drehrichtung dann umzukehren, wenn das Teil an der gewünschten Haltestellung nicht angehalten hat und dem Motor weitere, im wesentlichen gleichmäßig beabstandete Stromimpulse (l4) von steigender Dauer zu senden, und so weiter bis zum Halten in der gewünschten Stellung zu verfahren.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß, wenn nach einem bestimmten Zeitablauf nach dem Beginn der Haltephase das Halten an der gewünschten Stellung nicht erreicht wird, eine zweite Positionierungsphase gesteuert wird, bei welcher an den Motor eine weitere Reihe von kontrollierten Impulsen von steigender Dauer angelegt wird, wobei das Senden dieser Impulse gestoppt wird, wenn das Teil an der gewünschten Stellung vorbeiläuft.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß, wenn nach einem bestimmten Zeitablauf nach dem Beginn der Haltephase das Halten an der gewünschten Stellung nicht erreicht wird, eine zweite Positionierungsphase gesteuert wird, bei welcher an den Motor eine weitere Reihe von kontrollierten Impulsen von steigender Dauer angelegt wird, wobei bei jedem Vorbeilaufen an der gewünschten Stellung die Drehrichtung umgekehrt, und das Senden dieser Impulse gestoppt wird, wenn das Teil so nah wie möglich von der gewünschten Stellung ist.
  4. Verfahren nach einem der Ansprüche 1, 2 oder 3, dadurch gekennzeichnet, daß die Stromimpulse jeweils eine Dauer von etwa 200 ms, 400 ms, 600 ms, ... entsprechend einer arithmetischen Reihe in einem Schritt von 200 ms aufweisen.
  5. Verfahren nach einem der vorherstehenden Ansprüche, dadurch gekennzeichnet, daß die Impulse einen Abstand von etwa 1 s haben.
  6. Verfahren nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß der bestimmte Zeitablauf etwa 1 Minute beträgt.
  7. Verfahren nach einem der vorherstehenden Ansprüche, dadurch gekennzeichnet, daß der erste Impuls (l4), der nach dem Erfassen des Vorbeilaufens an der gewünschten Haltestellung, ohne in dieser Stellung zu halten, etwa 2 s nach diesem Erfassen gesendet wird.
  8. Verfahren nach einem der Ansprüche 2 bis 7 zur Anwendung bei einer Waschmaschine, deren drehbares Teil ihre Trommel ist, dadurch gekennzeichnet, daß, wenn die sich in der Trommel befindenden Wäsche eine hohe Unwucht aufweist, eine Umverteilung der Wäsche vor der Ansteuerung der zweiten Positionierungsphase vorgenommmen wird.
  9. Vorrichtung um beim Anhalten ein drehbares Teil (1) zu positionieren, das von einem Universalmotor (2) in Drehung angetrieben ist, mit einem Positions- oder Anwesenheitssensor, dessen erster Teil (4) am drehbaren Teil und dessen zweiter Teil (5) am Träger des drehbaren Teils gegenüber dem ersten Teil befestigt ist, wenn der drehbare Teil in der gewünschten Haltestellung liegt, mit einer mit einem das Teile des Sensors verbundenen Verarbeitungsschaltung (6), dadurch gekennzeichnet, daß sie eine Vorrichtung zum Steuern des Motors (7), die mit dem Sensor verbunden ist, und Schaltungen zum Erzeugen von Stromimpulsen von variabler Dauer aufweist.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der Positions- oder Anwesenheitssensor einen Magnet (4) und einen Schalter mit biegsamer Lasche (5) aufweist.
  11. Waschmaschine, dadurch gekennzeichnet, daß sie eine Vorrichtung zum Positionieren der Trommel gemäß der Ansprüche 9 oder 10 enthält.
EP96401568A 1995-07-21 1996-07-16 Verfahren und Vorrichtung zum Positionieren der Haltestellung der Trommel einer Topladerwaschmaschine Expired - Lifetime EP0754797B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9508863 1995-07-21
FR9508863A FR2736943B1 (fr) 1995-07-21 1995-07-21 Procede de positionnement a l'arret d'une piece rotative mue par un moteur universel, en particulier du tambour d'une machine a laver a chargement par le dessus, et dispositif de mise en oeuvre

Publications (2)

Publication Number Publication Date
EP0754797A1 EP0754797A1 (de) 1997-01-22
EP0754797B1 true EP0754797B1 (de) 2000-11-02

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Application Number Title Priority Date Filing Date
EP96401568A Expired - Lifetime EP0754797B1 (de) 1995-07-21 1996-07-16 Verfahren und Vorrichtung zum Positionieren der Haltestellung der Trommel einer Topladerwaschmaschine

Country Status (4)

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EP (1) EP0754797B1 (de)
DE (1) DE69610799T2 (de)
ES (1) ES2151643T3 (de)
FR (1) FR2736943B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1303116B1 (it) * 1998-10-09 2000-10-30 Elbi Int Spa Dispositivo sensore di posizione per il cestello di una macchina peril trattamento di biancheria.
ES2202999T5 (es) * 1999-12-23 2008-12-16 DIEHL AKO STIFTUNG & CO. KG Procedimiento para posicionar un tambor de lavado de una lavadora en una posicion objetivo.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2522343A1 (fr) * 1982-02-26 1983-09-02 Thomson Brandt Machine lave-linge
DE3707218A1 (de) * 1987-03-06 1988-09-15 Licentia Gmbh Verfahren zum positionieren der waeschetrommel einer mantelbeschickbaren trommelwaschmaschine
IT1228362B (it) * 1989-03-13 1991-06-14 Eurodomestici Ind Riunite Metodo e dispositivo per il bloccaggio in posizione opportuna del cestello di una macchina lavabiancheria del tipo a carica dall'alto.
ES2026381A6 (es) * 1989-11-28 1992-04-16 Bosch Siemens Hausgeraete Lavadora de tambor con carga por la cubierta.
FR2656010B1 (fr) * 1989-12-15 1992-02-28 Ciapem Procede d'arret d'un tambour d'un lave-linge mettant le portillon du tambour en vis-a-vis de la porte du lave-linge et lave-linge mettant en óoeuvre un tel procede.

Also Published As

Publication number Publication date
EP0754797A1 (de) 1997-01-22
ES2151643T3 (es) 2001-01-01
FR2736943B1 (fr) 1997-08-22
DE69610799D1 (de) 2000-12-07
DE69610799T2 (de) 2001-04-26
FR2736943A1 (fr) 1997-01-24

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